[CIG-SEISMO] Bug? Check functionality of force direction

Daniel B. Peter daniel.peter at kaust.edu.sa
Fri Feb 16 11:14:11 PST 2018


hi Mathias,

you’re right. it doesn’t work correctly for elastic point forces. i just came across the same bug which was introduced recently and will submit a bug fix soon to the devel branch.

many thanks for spotting!
daniel



> On Feb 16, 2018, at 19:46, Mathias Pilch <mathias.pilch at tu-dortmund.de> wrote:
>
> Dear developers of Specfem3D,
>
> there appears to be a bug in the latest devel version when using a point force source.
>
> The line in DATA/FORCESOLUTION
>
>    component dir vect source Z_UP:    -1.d0
>
> does not seem to have any effect. I tested it with a Gaussian with hdur = 0.06 s, and
> both
>
>    component dir vect source Z_UP:    -1.d0
>
> and
>
>    component dir vect source Z_UP:    1.d0
>
> However, the resulting seismograms (semv) look the same, while in reality those calculated with
> the opposite sign should yield the inverted seismograms.
>
> Could you please check that?
>
> Thank you in advance,
> Mathias Pilch
>
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